int main(void){
	int a,b;
	printf("enter two members:");
	int i;
	scanf("%d%d",&a,&b);
	for(i=1;i<5208;i++){
	int a=0;
	a=a+i;
}
	printf("add:%d\n",add(a,b));
	printf("sub:%d\n",sub(a,b));
	printf("mul:%d\n",mul(a,b));
	printf("div:%lf\n",div(a,b));
	return 0;
}
